Lukas Stefanko

Lukas Stefanko

Malware Researcher


Education: Masters in Informatic Engineering of the Technical University in Kosice

Highlights of your career? Malware Researcher

Position and history at ESET? Joined ESET as a Malware Researcher in 2011

What malware do you hate the most? Adware and ransomware

Favorite activities? Gym, squash, reading

What is your golden rule for cyberspace? Be reasonably paranoid

Favorite computer game/activity? Elasto Mania


76 articles by Lukas Stefanko

Insidious Android malware gives up all malicious features but one to gain stealth

Insidious Android malware gives up all malicious features but one to gain stealth

Insidious Android malware gives up all malicious features but one to gain stealth

ESET researchers detect a new way of misusing Accessibility Service, the Achilles’ heel of Android security

Lukas Stefanko22 May 20205 min. read


Breaking news? App promises news feeds, brings DDoS attacks instead

Breaking news? App promises news feeds, brings DDoS attacks instead

Breaking news? App promises news feeds, brings DDoS attacks instead

After being targeted by an Android DDoS app, ESET seized the opportunity to analyze the attack and to help put an end to it

Lukas Stefanko11 May 20204 min. read


Tracking down the developer of Android adware affecting millions of users

Tracking down the developer of Android adware affecting millions of users

Tracking down the developer of Android adware affecting millions of users

ESET researchers discovered a year-long adware campaign on Google Play and tracked down its operator. The apps involved, installed eight million times, use several tricks for stealth and persistence.

Lukas Stefanko24 Oct 20198 min. read


First-of-its-kind spyware sneaks into Google Play

First-of-its-kind spyware sneaks into Google Play

First-of-its-kind spyware sneaks into Google Play

ESET analysis breaks down the first known spyware that is built on the AhMyth open-source espionage tool and has appeared on Google Play – twice

Lukas Stefanko22 Aug 20195 min. read


Android ransomware is back

Android ransomware is back

Android ransomware is back

ESET researchers discover a new Android ransomware family that attempts to spread to victims’ contacts and deploys some unusual tricks

Lukas Stefanko29 Jul 20198 min. read


With FaceApp in the spotlight, new scams emerge

With FaceApp in the spotlight, new scams emerge

With FaceApp in the spotlight, new scams emerge

ESET researchers discover fraudulent schemes piggybacking on the popularity of the face-modifying tool FaceApp, using a fake “Pro” version of the application as a lure

Lukas Stefanko19 Jul 20193 min. read


Malware sidesteps Google permissions policy with new 2FA bypass technique

Malware sidesteps Google permissions policy with new 2FA bypass technique

Malware sidesteps Google permissions policy with new 2FA bypass technique

ESET analysis uncovers a novel technique bypassing SMS-based two-factor authentication while circumventing Google’s recent SMS permissions restrictions

Lukas Stefanko17 Jun 20195 min. read


Fake cryptocurrency apps crop up on Google Play as bitcoin price rises

Fake cryptocurrency apps crop up on Google Play as bitcoin price rises

Fake cryptocurrency apps crop up on Google Play as bitcoin price rises

ESET researchers have analyzed fake cryptocurrency wallets emerging on Google Play at the time of bitcoin’s renewed growth

Lukas Stefanko23 May 20195 min. read


Navigating the murky waters of Android banking malware

Navigating the murky waters of Android banking malware

Navigating the murky waters of Android banking malware

An interview with ESET malware researcher Lukáš Štefanko about Android banking malware, the topic of his latest white paper

Lukas Stefanko15 Feb 20193 min. read